Add temperature information to the data miner model

[markoceri]

Miner temperature is an important parameter that can be used to prevent damage to the miner itself. Edge Mining does not currently supports the use of the internal data model temperature. This parameter can be added and used by the rules engine to trigger a shutdown action.

Different miners may have one or more temperature sensors; currently, a single parameter could be added that collects the overall temperature, which is typically the most important one to monitor. This parameter could be optional, so as not to be essential for the edge mining system.